Fixed #30300 -- Allowed migrations to be loaded from directories without __init__.py file.

tests/migrations/test_migrations_namespace_package/0001_initial.py

@@ -0,0 +1,15 @@
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    initial = True
+
+    operations = [
+        migrations.CreateModel(
+            "Author",
+            [
+                ("id", models.AutoField(primary_key=True)),
+                ("name", models.CharField(max_length=255)),
+            ],
+        ),
+    ]